9 Microprocessor based pump controllers; flow meters, flow meter systems including a balancing valve for HVAC fluid systems; safety controls and valves, namely, boiler water feeders to safeguard steam and hot water boilers against the hazards of low water conditions, automatic automotive feeder cut-off combination valves, automatic float operated valves, liquid flow switches, liquid level controls, low water cut-offs, make up water feeder to insure an adequate supply of water for boiler demand, pressure relief valves to safeguard steam and hot water boilers against the hazards of low water conditions, proportioning regulators, pump controllers sequencing blow down valves, and replacement head mechanisms for feeders, cut-offs and pump controllers; electrical switches, namely, flow switches, float operated switches and snap switches; instrumentation for monitoring and controlling water and wastewater treatment processes, namely, electronic, mechanical, and pneumatic control panels, controllers, transmitters, gauges, receivers, tables, samplers, regulators, rate set stations, indicators, turbidimeters, ph meters, consoles, consolettes, programmable logic controllers, programmers, power supplies, cables, computers, monitors, printers, electric valve actuators, data recorders, ultrasonic flow transmitters, autodialers, venturi flow elements, permutubes, insert tubes, flumes, and parts and components therefore all sold as a unit; electrical and optical measurement, measuring, signal and monitoring apparatus and instruments, namely, temperature indicators, acid hydrometers, barometers, measuring apparatus for temperature and humidity levels in gases and solid substances, vibration meters, sound level meters, gas detectors for detecting the presence of carbon monoxide, carbon dioxide, nitrogen, nitrogen oxide, and ethylene gases, voltmeters, resistance measuring instruments, frequency meters, accelerometers, ammeters, anemometer, apparatus for testing gas, liquids and solids, automatic fluid-composition control machines and instruments, barometers, calorimeters, concentration meters, densimeters, electric meters, flowmeters, food timers, gas sensors for measuring gas concentration, hygrometers, liquid analyzers, pressure recorders, pyrometers, salinometers, speedometers, temperature sensors, thermistors, viscosimeters, electric meters and timers for testing oil and fat quality; vacuum measurement instruments, namely, pressure gauges; built-in thermometers; electronic contact thermometers; thermostats; residual flue-gas analyzers; bar code readers; electrical energy utilization metering devices; data loggers for the storage of measurement data regarding physical and chemical properties and parameters; electronic measuring, signaling and testing devices, namely, ion selective electrodes; orp sensors for measuring a reducing or oxidizing strength of a solution; ionmeters; electronic sensor extension cords and holders; flow-through adapters; analyzers for measuring the content of chemical or biological material in water or waste water, and water filters for use therewith; field monitors for on-site monitoring and analyzing of bod, ph-value, amounts of oxygen and other chemical substrates in liquids; meters, monitors and sensors for measuring oxygen, temperature, ph range and conductivity; bod sensors for measuring the biological oxygen demand; sensors for determining soil respiration, biodegradation, biogas, determination, anaerobic degradation and microbiology; measurement devices for soil respiration rates; colony counters; photometers; turbidity meters; multiplexers; multiparameter meters for liquid, water and waste water analysis; stirrers, namely, an electrically actuated stirrer for stirring a liquid sample in a test container or having an actuated stirring mechanism coacting with an electromagnetic stirring element through the container wall; thermostating chambers, namely, electrically heated and/or cooled chambers to keep test samples at a desired temperature; electrical sensors; analyzers for nitrate, nitrite, ammonia, ammonium, phosphate, total phosphate and other chemicals comprised in water or waste and for a combined measurement of these parameters; software, printers, connecting cables and measuring stations for measuring devices for measuring bod, temperature, oxygen content and the content of chemical substrates in liquids, especially water and waste water; adapters for connecting sensors to cables and measuring devices; Meters, measuring apparatus, instruments and appliances, namely, pH-meters, conductivity meters, dissolved oxygen meters, redox meters, photometers, spectrophotometers, and multi-parameter meters, namely, combined pH, ion selective electrode (ISE), conductivity and dissolved oxygen (D.O.), oxidation reduction potential (ORP), and T meters; photometer accessories sold as a unit with photometers, namely, curettes, vials, optical filters, halogen lamps, paper rolls, cables, cell holders, temperature sensors, stirrers, printers, deuterium lamps, automatic cell changers, sippers, filter sets, thermopacks, quartz cells, flowthrough cells, cylindrical cells and micro cells, glass cells, flowthrough cells, cylindrical cells and micro cells; titrators, piston burettes, sample changers, namely, sample containers for laboratory testing; stirrers for laboratory use, titration vessels, titration tips, titration electrodes, volumetric Karl-Fisher titrators, coulometric Karl-Fisher titrators; instruments for quantitative analytical chemistry, namely, water distillers, titrators, piston burettes, sample changers, stirrers, titration vessels, titration tips, titration electrodes, volumetric Karl-Fisher titrators; coulometric Karl-Fisher titrators; instruments for quantitative analytical chemistry, namely, physical or chemical sensor system for the detection of concentrations of ions and substances in liquids; software for titration which calculates concentrations, storing of titration parameters and maintains a database of titration results and parameters; software for viscosity measuring apparatus, namely, software for controlling of viscosity measuring instruments, calculation of viscosities, storing of measuring parameters and providing a database of measuring results and parameters; software for photometry measuring methods, namely, software for controlling of spectrophotometers, calculation of concentrations, storing of measuring parameters, and providing a database of measuring results and parameters; laboratory apparatus, instruments, and appliances not already listed, namely, pH electrodes, oxygen electrodes, ORP electrodes, conductivity electrodes, laboratory electrodes, temperature sensors; connection cables for use in connection with electrodes; automatic viscosity measurement systems, namely, electronic time-measuring units to determine viscosity; thermostats, viscometers, hotplates for use in laboratories, laboratory stirrers; laboratory measuring instruments, titrators, namely, piston burettes metering system combined with a pH-meter for electrical regulation, and titration vessels in the nature of flasks as parts of titrators; electrical or electronically controlled titration automats, namely, physical or chemical sensor system for the detection of concentrations of ions and substances in liquids; flow and level instrumentation for the monitoring and control of fluids-namely, differential pressure units, recorders, indicators, switches, controllers, transmitters, meters, densitometers, computers, sealed sensor systems consisting of assemblies, tubing and differential pressure units and analyzers; boiler pressure controls; pressure relief valves for boilers, water tanks and heaters; float actuated electrical switches, flow switches for making or breaking an electrical circuit; liquid level controls used to guard against low or high levels; time delay relays; solar powered pump system for pumping water, comprised of a solar panel for production of electricity, non-metal garden stake for securing the solar panel, rechargeable battery, submersible pump, pump controller, and plastic intake hose sold as a unit; pump monitoring gauges